One vertex per element, one color per generator, with an edge from x to x·s.
(5,6,11,15,10,7,9,13)(8,16,20,12,19,17,18,14)(21,22,26,35,27,24,25,29)(23,30,32,28,34,36,33,31)(1,2)(3,4)(5,7,10,6)(8,17,19,16)(9,13,11,15)(12,18,14,20)(21,23,27,34)(22,28,24,31)(25,32,26,33)(29,36,35,30)(2,4)(6,7)(12,14)(13,15)(16,17)(21,24)(22,27)(23,31)(25,35)(26,29)(28,34)(30,32)(33,36) involution — undirected(5,8,10,19)(6,12,7,14)(9,20,11,18)(13,17,15,16)(23,32)(25,26)(28,36)(29,35)(30,31)(33,34)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.